CVE-2025-27462: WinPVDrivers: Excessive permissions on user-exposed devices

Published May 27, 2025

Updated

[This CNA information record relates to multiple CVEs; the text explains which aspects/vulnerabilities correspond to which CVE.]

The Windows PV drivers expose various facilities to userspace. Several of these have no security descriptor, and are therefore fully accessible to unprivileged users. These are:

1. XenCons, CVE-2025-27462 2. XenIface, CVE-2025-27463 3. XenBus, CVE-2025-27464

Affected Software

3 affected components

Xen Project XenCons

Xen Project XenIface

Xen Project XenBus

Event History

Jul 9, 2026

CVE Published

via MITRE·02:27 PM

Data Sourced

via MITRE·02:27 PM

DescriptionWeakness

Data Sourced

via NVD·04:16 PM

DescriptionSeverityWeakness

Frequently Asked Questions

What is the severity of CVE-2025-27462?

CVE-2025-27462 is classified as a high-severity vulnerability due to its potential impact on user data and system integrity.

How do I fix CVE-2025-27462?

To fix CVE-2025-27462, update your XEN WinPVDrivers to the latest version released by the maintainers that addresses this vulnerability.

What are the risks associated with CVE-2025-27462?

The risks of CVE-2025-27462 include unauthorized access to user-exposed devices and potential data leakage.

Which versions of XEN are affected by CVE-2025-27462?

CVE-2025-27462 affects specific versions of XEN WinPVDrivers, and users should consult the vendor's advisory for the exact versions impacted.

Is there a workaround for CVE-2025-27462?

While the recommended approach is to update, temporarily limiting device access permissions may serve as a workaround for CVE-2025-27462.